Device for imparting a “grouted edge” appearance to the face of a floor covering during the installation process. A hot air gun is mounted on a carriage that rests on the face of a field-cut flooring module or tile. The carriage is moved across the face of the module while a guide or guides attached to the carriage and contacting an edge of the tile maintain the lateral position of the hot air gun adjacent to the module edge so that a “grouted edge” appearance is produced.